Four-blade rotor assembly replacement for Combiner Wars Vortex/Blades/Alpha Bravo.
This kit changes the transformation of the base of the rotor by adding another pivot, allowing the axle of the rotor to move higher on the back of the robot.
You need to knock out the short 2mm pin connecting the base piece to the body. I find heating with soldering iron is very helpful.
The rotor is designed to work with the original blades - you can use two from another heli bot, or I sell a set of "knock off" blades too.
You also need to save the pin at the bottom of the original rotor. The only way to get it out, as I find it, is to cut the original rotor open. Heating or knocking won't do it, but you can certainly try.